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Clustering Tomcat
I’ve been meaning for some time to set up Tomcat clustering in several different ways just to see how it works. I finally got a chance today. There are guides and other bits of information elsewhere on...
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Clustering Tomcat (part II)
Refer to my earlier post on the subject for background. Here are some more things I ran into. Tricking mod_proxy_html It didn’t take too long to come up against something that mod_proxy_html wouldn’t...
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Clustering Tomcat (part III): the HTTPS connector
Refer to my earlier posts on the subject for background. Here are further explorations, not having much to do with clustering as it turns out, but everything to do with proxying. In a number of...
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What does a tech support geek do all day anyway?
I hate to let a calendar month go by with no post. Though hey, I’m so far behind on reading my web comics, I don’t even know how far behind I am anymore. That’s when you know it’s serious. Being a...
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OpenShift with dynamic host IPs?
From the time we began packaging OpenShift Enterprise, we made a decision not to support dynamic changes to host IP addresses. This might seem a little odd since we do demonstrate installation with the...
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OpenShift, Apache, and severe hair removal
I just solved a problem that stumped me for a week. It was what we in the business call “a doozy”. I’ll share here, mostly to vent, but also in case the process I went through might help someone else....
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OpenShift logging and metrics
Server logs aren’t usually a very exciting topic. But if you’re a sysadmin of an OpenShift Enterprise deployment with hundreds of app servers coming and going unpredictably, managing logs can get…...
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HA applications on OpenShift
Beginning with version 2.0, OpenShift Enterprise supports making applications “highly available”. However, there is very little documentation on the details of implementing HA apps or exactly how they...
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Implementing an OpenShift Enterprise routing layer for HA applications
My previous post described how to make an application HA and what exactly that means behind the scenes. This post is to augment the explanation in the HA PEP of how an administrator should expect to...
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